Live monitor preview for the instructor

Show a small live copy of the Display Monitor directly on the Controller page, so the instructor can see exactly what the student sees without needing a second screen or asking the student what their monitor shows.

We tested this on a competitor app. It shows up as a small panel embedded right in their instructor control screen, updating live as things change, not a separate window.

Where exactly this sits in our layout is a design decision for whoever builds it, our current controller page has room for a new panel or a collapsible section. The important part is that it stays live and updates in real time, since our display monitor already has all the rendering and data polling built, this would reuse that rather than building a second version from scratch.